Loaded up 500 rounds of 9mm and 200 rounds of 45acp.

Right as I was starting, I caught what would have been a squib load. I usually weigh each of the first 5 or 10 powder charges after setting up the press. The first 5 were right on, so then I stopped weighing each one. Using the lee auto disc powder measure, had a couple rounds in a row where the measure sounded a little different, didn't really register until the 3rd or 4th one when I finally I stopped and looked in the case before putting the bullet on, and it had no powder. The sliding part of the measure had bound up, so that it didn't return to it's normal resting position, so more powder couldn't fill the hole. Because I wasn't sure when I had first heard it sound a little different, I got to unload the 15 rounds I had done so far in that batch. Out of 15 that I unloaded, sure enough one finished round also had no powder. I got a small magnetic light to attach under the turret, and started eye-balling the powder before each bullet. I disassembled and cleaned up the moving parts of the measure and didn't have another issue, but kept on eye-balling all the rest of the rounds I loaded. Hopefully I learned my lesson and don't have to catch a squib the hard way.